Question

Primary immunodeficiency makes a person highly susceptible to infection. It is caused by

• A. Lack of B cells
• B. Lack of T cells
• C. Complement deficiencies
• D. All of the above

Answer 1

The correct option is D All of the above

Primary immunodeficiency disorders weaken the immune system, allowing infections easily. It is the condition in which body's immune system is not able to fight infection because of lack or deficiency of immune cells such as B cells, T cells and complement deficiency. One of the most common signs of primary immunodeficiency is an increased susceptibility to infections.

Thus, the correct answer is option D.